linux/arch/ia64
Ashok Raj 54d5d42404 [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity
When handling writes to /proc/irq, current code is re-programming rte
entries directly. This is not recommended and could potentially cause
chipset's to lockup, or cause missing interrupts.

CONFIG_IRQ_BALANCE does this correctly, where it re-programs only when the
interrupt is pending. The same needs to be done for /proc/irq handling as well.
Otherwise user space irq balancers are really not doing the right thing.

- Changed pending_irq_balance_cpumask to pending_irq_migrate_cpumask for
  lack of a generic name.
- added move_irq out of IRQ_BALANCE, and added this same to X86_64
- Added new proc handler for write, so we can do deferred write at irq
  handling time.
- Display of /proc/irq/XX/smp_affinity used to display CPU_MASKALL, instead
  it now shows only active cpu masks, or exactly what was set.
- Provided a common move_irq implementation, instead of duplicating
  when using generic irq framework.

Tested on i386/x86_64 and ia64 with CONFIG_PCI_MSI turned on and off.
Tested UP builds as well.

MSI testing: tbd: I have cards, need to look for a x-over cable, although I
did test an earlier version of this patch.  Will test in a couple days.

Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Zwane Mwaikambo <zwane@holomorphy.com>
Grudgingly-acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:15 -07:00
..
configs [IA64] Updated tiger defconfig 2005-08-17 10:24:17 -07:00
dig Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hp [IA64] arch/ia64/hp/sim/boot/fw-emu.c: remove egcs workaround 2005-08-24 14:50:37 -07:00
ia32 [IA64] remove use of asm/segment.h 2005-08-24 13:23:30 -07:00
kernel [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity 2005-09-07 16:57:15 -07:00
lib Pull pending-2.6.14 into release branch 2005-08-29 15:48:23 -07:00
mm [IA64] Rationalise Region Definitions 2005-08-24 15:35:41 -07:00
oprofile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci Pull asm-segment into release branch 2005-08-29 14:14:40 -07:00
scripts Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sn Pull ngam-maule-steiner into release branch 2005-08-29 15:48:51 -07:00
Kconfig [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity 2005-09-07 16:57:15 -07:00
Kconfig.debug [PATCH] Kprobes/IA64: arch specific handling 2005-06-23 09:45:22 -07:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
defconfig [PATCH] update all defconfigs for ARCH_DISCONTIGMEM_ENABLE 2005-06-23 09:45:02 -07:00
install.sh Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
module.lds Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00